Attachment for sanding-machines.



PATENTED APR. 21, 1908.

. W. MUNOH.

ATTACHMENT FOR SANDING MACHINES.

AFPLIOATION FILED AUG. 13, 1907.

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' openings or cross slots WALTER MUNOH, OF KANSAS CITY, MISSOURI.

ATTACHMENT FOR SANDING-MACHINES.

Specification of Letters Patent.

Application filed August 13,

Patented Apr-i121, 1908.

1907. Serial No. 388,413.

To all whom it may concern."

Be it known that I, \VALTER MUNon, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Attachments for Sanding-Machines, of which the following is a specification.

' This invention relates to attachments for samling machines, and my object is to produce an attachment whereby the edges of planks or strips of wood of varying width and length may be efficiently andaccurately smoothed singly or collectively.

A further object is to produce an attachment of this character which can be easil and quiekly applied' to a sanding machine and which-is of simple, strong, durable and inexpensive construction. i.

To these ends the invention consipts in certain novel and peculiar features of construction and organization of parts as h, reinafter described and claimed; and in order that it may be fully understood reference is to be had to the accompanying drawing, in which:

Figure 1, is a perspective view of a portion of u sanding machine attachment embodying my invention. Fig. 2, is a detail perspective view of a part of the attachment. Fig. 3, is a section taken on the line lIL-HI of Fig. 1. Fig. 4,. is a plan view on a reduce l scale, of the attachment applied in operati ,0 position to a sanding machine of which the part above the bed is omitted. Fig. 5, is a vertical section taken on the dotted line of V of Fig. 4,

and also shows the upper series of feed-rolls of the sanding machine.

In the, said drawing, 1 indicates t 1e bed of a sanding machine of the constructibn shown or of any other suitable or preferited type, said bed being provided with a plurality of openings or cross slots 2 and a plurality of 3, the sand-drums 4 )rojecting up through openings .2 and the iced-rollers 5 up through openings 3, to a plane just above the bed.

6 indicates the upper feed-rollers, the same being disposed above rollers 4 and 5 and capable of being vertically adjusted to accommodate stock to be smoothed or finished,

Referring now to the attachment, 7 i dicates a pair of parallel angle-bars provifiied in the upper edges of their upwardly projecting arms with segmental recesses'8 to receive the rollers 6 at times, as hereinafter exexplained.

.of angle-bars 16.

' but is adjustable through the spendingv em 5 plained, and 9 are lining stri s for the upwardly projecting arms of tie angle-bars, these lining strips being preferably of smooth wood and provided with recesses 10 registering wiih recesses 8 and having their front ends curved or beveled as at 11 to'provide a flaring mouth to facilitate the reception of the stock as hereinafter explained.

' 12 are s (icing-plates underlying the ends of the ang e-bars, which it should be stated are of length to project beyond each end of the bed of the sanding machine a distance of somewhat less than the width of said spacingplates so that the latter shall overlie and rest upon the ends of the bed and thus support the angle-bars slightly, above the rollers 4 and 5. The spacing-plates are provided with depending ribs 13 engaging the longitudinal slots.14 and 15 in angle-bars 16, these angle-bars extending transversely of angle-bars 7 and fitting against the front and rear ends of the bed-plate 1 to revent movement of the attachment in a irection longitudinal of such bed.

Extending through the horizontal fimige of one of the angle-bars 7 and through the spacing-plates 12 underlying the same are bolts 17 having their heads countersunk in said an -glebar and engaged at their lower ends by nuts 18, the latter being utilized to clamp washers 19 against the undersides of the horizontal arms of the angle-bars 16 without holding the former so tightly as to prevent movement laterally of the bed, as hereinafter The other angle-bar 7 has bolts 20 extending down through its horizontal arm and the underlying spacing-plates, and said bolts are engaged by the clamping 'nuts 21 and the washers22 which are clamped by said nuts against the undersides of the arms The angle-bar 7 last-re: ferred-to is adapted to be clamped rigidly by the bolts 20 and nuts 21 to the angle-bars 16,

transversely commodate the stock to be e erated upon.

23 are bolts countersunk y preference in the upwardly projecting arms of the anglebars 7 secured in osition by bolts 17 and nuts 18, and, said olts 23. extend outward arts or shoulders at the correof bars 16, the said parts or oulders being preferably angle-brackets 24 riveted to said bars 16.

25 are ex )ansive coil-springs mounted on bolts 23 and against the last-referred-to ang e-bar' 7 and the in order to ac hearing at their opposite ends 7 said brackets, nuts-' 26 engaging the outer ends of said'bolts 23 to tension said springs when desired. 5

27indicates lates to Yunderlieand engage the. ends of the ed lffor the purpose of hold-I mg the angle-bars 7; in their properposition with relationito the bed, thatis, to prevent bars7- from being lifted or jolted upward.

while the stock is passing throu'ghthe attachment, said plates 27 being carried by screwbolts 28 adjustable vertically in vertical slots 29 in the depending ortions ofangle ba'rs 16, as shownclearly in ig; 5.

Assuming now that the sanding machine is in operation and that the attachment 1s"se-- cured thereto asshow'n, the machine attend ant sli s the stock, viz. a strip or bar of wood or a p urality of strips or'hars arranged flat wise. together as shown by dotted lines at 30 in Fig. 3, into ment, that is slips said v bar or bars between- -the front end of. the-attachthe angle-bars 7 or the wood linin stri s 9,

and shoves the stock forward, unti its ont" end projects beyond the first set of rolls 5 and 6 with the loweredge of the stock resting on,

' theiront. bar 16 and the firstroll 5. He then I 7 rear'end of the machine, as explained, they in the usualmannen'lowers the upperset of feed-rolls until the first one engages the upper end ofthestock, when the latter, under the frictional engagement, of the rolls 5 and- 6 'which revolve in the direction indicated by the contiguous arrows, Fig. 4, moves in the direction indicated by the longitudinal are rows in said figu-reflt being understood that the stock fits between the lining bars 9 sufficiently snug to insure synchronous movement of all of the sto'ck-stripsif a plurality are being'operated upon as explained-this snug fitting of the stock also guardingagainst any tilting of thestock strip or strips so as to insure their u right position between the bars.

As the stoc is drawn through the machine from front to rear by the-feed-rolls the revolving sanding drums smooths the lower edge of the stock so that when the strip or strips emerge at the rear end ofthe machine-they Y shall need no planing or sand papering but are ready for use. As they emerge fronethe are grasped by the attendant and carried "back to-the front end of the ina'chin'e again and inverted and again fitted in the attach- I be seen that the edges 6f the 'stockcan be ment as previously explained, this second passage through the; machine smoothing their opposite edges. Bv this means it will smoothed in planes at right-angles to its sides efficiently and'with great rapidity, andit will also be apparent that the number of pieces of stockthat are thus" acted upon -s'imu1tane-' ouslyis only limited by the distance which one'of the angle-bars 7 can be set from the other or spring-actuated one, the yielding pressure of the latter being toaccommodateany slight irregularity or warpage that may exist in the stock or any strip thereof, and it will also beapparent that throughthe instrumentality of this attachment-an exceedingly thin strip can be properly smoothed or fin v ished at its narrow edges.

-' If the stockfis of greater width than the depth of the bars 7, the upper feed-rolls will .of course be disposed above the latter a suificient distance to, accommodate the width of the stock. On the other hand ifthe'width of the'stock is less than the depth of bars '7, it canibeprop'erly smoothed because the cavities in bars 7 and their lining strips are adapted to receive the upper feed-rolls.

In fact any strips can be smoothed, through the use of this attachment which exceed in width the v'ertical,distance between-the lower feed rolls and the lowest points of said cavities, as will be apparent byreference to Fig. 4. If desired the lining strips 9 may bedispensed with but the use of such strips is preferred as otherwise the inner faces of the angle-bars 7. would have to be not only exactly parallel but would also have to be perfectly smooth whereas byusing smooth wood strips 9, common or rough ang e-bars'7 may be en1- ployed. It will hkewise'be understood that any stock may be-smoothed in this machine provided its length exceeds the distance from center to center of adjacent feed-rolls .6;

- From the'above description it will be aparent that I have produced an attachment or sanding machines, embodying the fea-' tures of advantage enumerated in the state- 'ment ofthe object of the invention, and I b etweenthe first-named bars, and means for holding one of said longitudinal bars pressedyieldingly toward the other;

A sanding machine attachment, I comprising transverse bars, s acing-plates mounted thereon, longitudinal are mounted o'n the spacing-pl ates and bridging the space between the fi'rst-naind-bars, and provided in their upper edges with recesses to receive the upper rolls of'the sanding machine, and

means-"for-holding one of said longitudinal bars pressed yieldingly toward the other.

" '3'. A sanding-.ma'chine 1 attachment, 'comprising transverse-'- bars, s acingi-plates mounted thereon, longitudinal ars mounted on the 'spac'ing-platesand bridging the space between the first-named bars, and. provided in their upper edges with recesses to receive the upper rolls of the sanding machine,

;means for holding one of said longitudinal "bars pressed yieldinglytoward the other, and means for guiding said yieldingly-pressed bar to insure its parallelism with the companion longitudinal bar.

4. A sanding. machine attachment, comprising a pair of parallel bars, a pair of spacing-plates mounted on each of said bars with one of said spacing-plates of each bar adjustable toward the other spacing-plate on the same bar, means to clamp said adjustable spacing-plates rigidly at the desired o'ints, alongitudinal bar connecting the adustable spacing-plates, a companion longitudinal bar connecting the other pair of s acing-plates and extending parallel with t e first-named longitudinal bar, and means for pressing the second longitudinal bar yieldingly' toward the first.

5. A sanding machine attachment, comprising a pair of parallel bars, a pair of spacing-plates mounted on each of said bars with onegof said spacinglates of each bar adjustable toward the ot er spacing-plate on the same bar, means to clamp said adjustable spacing-plates rigidly at the desired oints, a

a longitudinal bar connecting the a ustable spacing plates, a companion longitudinal bar connecting the -other pair of spacing-plates and extending parallel with the first-named longitudinal bar, expansive s rings pressing the last-named longitudinal ar toward the companion longitudinal bar and means to tension said springs.

' 6. A sanding machine attachment, comprising a pair of parallel bars, a pair of spacing-plates mounted on each of said bars with one of said spacing-plates of each bar adjustable toward the other spacinglate on the same ,bar, means to clamp sai adjustable spacing-plates rigidly at the desired points, a longitudinal'bar connecting the adustable spacing-plates, a companion longitudinal bar connecting the other pair of s acing-plates and extendin parallel with the first-named longitudinal ar, expansive I springs pressing the last-named longitudinal bar toward the companion longitudinal bar,

meansto tension sa1d springs, and means for guiding the springressed longitudinal bar to maintain it para el to its companion bar. 7. A sanding machine attachment, comprising transverse bars, s acing-plates mounted thereon, longitudinal ars mounted on the spacing-plates and bridging thesp'ace between the first-named bars, means for holding one of said longitudinal bars pressed yieldingly toward the other, and Iplates secured to the first-named bars at t eir inner or adjacent sides.

8. The comb'..ation with a sanding machinev having superposed series of feed-rolls, sanding drums underlying certain of said rolls wlth their u per tangents in substantially the same ane as the corresponding tangents of the ower feed-rolls, and a bedplate provided with openings or slots through which the lower feed-rolls and sanding drums upwardly project, of an attachment, comprising transverse bars .fitting' against the front and rear ends of the bed-plate and pro- 'vided with plates underlying and engaging the same, spacing-plates secured upon the transverse bars and overla ping and resting on the contiguous ends of the bed plate, longitudinal bars brid ing the space between and supported by the spacing-plates barely above the lower series of feed-rolls and the sanding drums, and means for yieldingly pressing one of said longitudinal bars toward the other.

9. The combination with a sanding inachine having superposed series of feed-rolls, sanding drums underlying certain of said rolls with their upper tangpnts in substantially the same ane as t tangents of the ower feed-rolls, an a bedplate provided with openings or slots through which-the lower feed-rolls and sanding drums upwardly projectfof an attachment, come corres onding prising transverse bars fitting against the having their inner faces parallel and their front ends beveled to provide a flaring mouth for the space between them.

In testimony whereof I afiix my signature, in the presence of two witnesses.

WALTER MUNOH.

Witnesses:

H. C. RODGERS, G. Y. THQRPE. 

